It is just a way of asking somebody what they are thinking.
"Penny for your thoughts" means "I would like you to tell me what you are thinking about"
This expression is used when asking a musing or pensive person what they are thinking. It probably originated when a penny was worth something - perhaps a loaf of bread - and indicated that you were...
a penny earned, a penny saved means the money you save (and dont spend) then it is earnedBecause you don't waste it so it's practically saved
It is just a funny way of asking what you are thinking about, as if you are going to pay them a penny for each thought.
Going to the toilet (bathroom). Originated from pay in the slot toilet cubicles at railway stations.
Paraklesis' Thoughts on Plants
Our Thoughts on Obama's First Year
What Stomach and Back Pains Mean
What Does Being a Champion Mean